Convert arrays to XML files and vice versa

This time I will bring you the conversion of arrays and XML files. What are the precautions for converting arrays and XML files? The following is a practical case, let's take a look.

Recently, WeChat payment is being made, and the WeChat server returns all XML files, so it needs to be converted into an array to facilitate operation. Without further ado, let’s go directly to the code:

1. Convert XML to array

/**
 * 将xml转为array
 * @param string  $xml xml字符串或者xml文件名
 * @param bool   $isfile 传入的是否是xml文件名
 * @return array  转换得到的数组
 */
function xmlToArray($xml,$isfile=false){
  //禁止引用外部xml实体
  libxml_disable_entity_loader(true);
  if($isfile){
    if(!file_exists($xml)) return false;
    $xmlstr = file_get_contents($xml);
  }else{
    $xmlstr = $xml;
  }
  $result= json_decode(json_encode(simplexml_load_string($xmlstr, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
  return $result;
}

Usage example:

$xmlDoc=<<<ETO
<books>
 <book>
 <author>Jack Herrington</author>
 <title>PHP Hacks</title>
 <publisher>O'Reilly</publisher>
 </book>
 <book>
 <author>Jack Herrington</author>
 <title>Podcasting Hacks</title>
 <publisher>O'Reilly</publisher>
 </book>
 <book>
 <author>XML格式化</author>
 <title>脚本之家在线工具</title>
 <publisher>tools.jb51.net</publisher>
 </book>
</books>
ETO;
$relarr=xmlToArray($xmlDoc);
print_r($relarr);

Run result:

Array
(
  [book] => Array
    (
      [0] => Array
        (
          [author] => Jack Herrington
          [title] => PHP Hacks
          [publisher] => O'Reilly
        )
      [1] => Array
        (
          [author] => Jack Herrington
          [title] => Podcasting Hacks
          [publisher] => O'Reilly
        )
      [2] => Array
        (
          [author] => XML格式化
          [title] => 脚本之家在线工具
          [publisher] => tools.jb51.net
        )
    )
)

2. Convert array to XML

/**
 * 数组转xml字符
 * @param string  $xml xml字符串
**/
function arrayToXml($data){
  if(!is_array($data) || count($data) <= 0){
    return false;
  }
  $xml = "<xml>";
  foreach ($data as $key=>$val){
    if (is_numeric($val)){
      $xml.="<".$key.">".$val."</".$key.">";
    }else{
      $xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
    }
  }
  $xml.="</xml>";
  return $xml;
}

Usage example:

$arrDoc= array("author"=>"XML格式化","title"=>"脚本之家在线工具","publisher"=>"tools.jb51.net");
$xmlrel=arrayToXml($arrDoc);
//运行结果：<xml><author><![CDATA[XML格式化]]></author><title><![CDATA[脚本之家在线工具]]></title><publisher><![CDATA[tools.jb51.net]]></publisher></xml>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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